Shield structure for explosively actuated tools



y 1, 1955 R. T. CATLIN ET AL 2,743,443

SHIELD STRUCTURE FOR EXFLOSIVELY ACTUATED TOOLS Filed Nov. 18, 1954 2 Sheets-Sheet l J 2 \w r 71 ET F Fly 2 INVENTOILZ,

A 7'TOR/VEYS May 1, 1956 R. T. CATLIN ET AL SHIELD STRUCTURE FOR EXPLOSIVELY ACTUATED TOOLS Filed Nov. 18, 1954 2 Sheets-Sheet 2 INVENTORS ROBE/P7 7. CATL/A JOHN CLAfi/(E S/NEX A TTORNE Y5 Un d statsslmfl o Robert T. Catlin, Trumbull, and Jamar; saint, ivmford, Conn., assignors to Remington'- Bridgeport, Conn., a corporation of Delaware Application November-.18, sclaimslwr. p445 This invention relates to a guard or shield for powder actuated tools, and contemplates a boxlikeguard of a marginal configuration conforming substantially to the contour of workpieces to be 'securedin place by use of the tool. I i

A now familiar type of explosively actuated tool contemplates the driving of a fastening'device or stud into difiicultly penetrable materials, such as brick, cement and cinder block, poured concrete and steel. A common use of the tool is in the securing of .van'ous'objects to surfaces of such materials, and among the objects to be thus secured are tubular electricalconductor containers and outlet fittings therefor.

The present invention is directed specifically to a guard adapted to receive the basal portion of such a tubular container and in assembled relation therewith an outlet fitting, the guard being so constructed as to receive such elements and at the same time continuous shield about the pointof penetration of the driven stud, thereby preventing the escape of such objects as fragments of the material being penetrated.

In the drawings: Y

Fig. 1 is a sectional side that the lower end portions are on line 1a"1a" of Fig. 3. Fig. 2 is a fragmentary transverse sectional elevation, substantially on the line 2-2 of. Fig. 1.

Fig. 3 is a fragmentary transverse sectional elevation, substantially on the line 33 of Fig. 1.

Fig. 4 is a fragmentary transverse sectional elevation, substantially on the line 4-4 of Fig. 1. a

Numeral identifies the end portion of the barrel of an explosively actuated in sleeve 11 assembled therewith. The drawings show the barrel in its foremost position. Sleeve 11 is received within and for rotation relative to a tubular member 12 which is rigidly secured to a guard box identified generally by numeral 13. The end portion 121 of tubular member 12 within the guard box is of reduced exterior and interior dimensions for a purpose to be described, and adjacent the junction of the full diameter and reduced diameter portions of said member and also within the guard box said member maybe laterally vented as shown at 14. The bore of part, 121 is preferably of substantiallythe same diameter as the bore 15 of the barrel. l Y

The guard of this invention is especially designed for use in the assembly and securing of electrical conduits and fittings of the type known'as Florduct.. The Florduct conduit comprises a base member B and a cap memher, not shown, adapted to be snapped over the marginal portions of the base B. As clearly shown in Figs. 2, 3 and 4, said base B is of channel or troughlike configuration, comprising a flat mid-portion and upwardly and inwardly extending marginal portions. The junction or provide a substantially Arms Company,

upturned marginal portions 2,743,443 Patented Ma 1, 1956 outlet box to be assembled to the base. B, and together therewith to be secured say to a concrete wall, comprises end walls C, side walls.-D,.and bottom flanges E which are spaced to receive but not trated in Fig. -3. At the upper mid-portions of the end walls C are -1nturned earsor flanges Fcomprising threaded apertures adapted for the reception of cover plate securing screws. The lower mid-portions of end walls C arerecessed as shown at C' to receive both the'base B and a cap" (not shown) of the Florduct. -The guard of the present invention contemplates .positioningthe outlet box relative to the guard and v positioning the assembly of guard and outlet box transversely with'respect tothe base B, the perimeter of the open face of the guard being in contact with the surface to 'WhiCh the work is to be secured, and all lateral openings in the guard. being sub- I stantially filled by the work. 7

Referring to Fig. 3, it will be noted that the tubular member 12 and its extension 121 are so located with. respect to the perimeter of guard box 13 that the barrel. extension 151 formed by the reduced diameter tube 121.

, depth as to just clear the marginal-portions of the base B and of such width as to be rather closely received between the side walls D of the outlet box, thus laterally locating the inner end of the outlet box. The end wall 133 of the guard box comprises vertically disposed slots 135 adapted to receive the side walls D of the outlet box and defining a plate 136 having a bottom margin 137 which just clears the upturned marginal portions of base B. A tongue 138 projecting downwardly from the mid-portion of plate 136 is received between the marginal portions of base B and substantially fills the trough formed thereby. The engagement of side walls D of the outlet box in slots 135 locates the outer end of the spect to base B. Longitudinal placement of the outlet box with respect to the guard is effected by, the engagement of the ends of the ears F with the outer surface of box wall 133 and baflle 134 respectively, as clearly shown. in Fig. 1.

Since it is contemplated that the base B may extend beyond the outlet box, the end wall 132 of the guard is apertured to receive the base, as shown in Fig. 4. The aperture comprises cut-outs 139 adapted to receive the wall 132 of the guard box transversely with respect to the base. The assembly is thus held in such a manner as to insure that the driven studs will penetrate the flanges E while the outlet box is correctly positioned upon base B.

What is claimed is:

1. A shield for a'powder actuated stud driving tool. adapted to facilitate the attachment to a Work face of a fitting comprising side walls and end walls, said shield comprising an open-face boxlike structure having a perimeter adapted to engage the work face, there being in a wall of said shield slots adapted to receive the side walls.

pass the base B, as illusdefine/a plate received between said file withintsaideshieldaadaptedrtot.in=M

ment of an end wall of said fitting aid fitting transversely of said-fitting:anrl sidewvallsand a ba teriorly engage an ele and together with said plate locate s andrflaterallyi'in saidwshield fi 2. rishieldlandr studmdrivin'g .tooleada'pte attachment to a worldfaceo a hollowefitting. comprising si nr aperturessadapted! elcment t said'ishield'lcomp fining :a perimetemadapteduto material dhere beingcin a. wall: to ,rece'mcwthei 1SidQ U- Vas Of l- Sfll enzsaidisidemalls ofiisaid; plateiiadapt 4a vbafilewvithintasai Morley-holder wforita powder actuatcd r ddo)facilitatezihetassembly handm-l f: a troughalike'element andv'l de-iwallsi'an'd end -vvails .haw+

:focreceiveusaidr trough-lik 210 is andside-lwalls de engage: th ensurfaceoft: said l of-said shieldslots=adapted plate :receivedme'twe pa: tonguer-projeetiriig l 5 from: atheaireer: endn trough-likeilelement; to interiorlyr engage: a per fitting Land togethemwithivsaid platen transverselynand1laterallyz'in'gsaid shieldix ed: to enter said' dz shield adapted 1 tion "of an zen'd wall ofsaidllocate said fitting 3. rpbar'aasgaaa g to claim 2, in which said plate comprises.antextensiomxeceivedatransverselywithinaid. It

trough-like element, thereby locating the assembly of said shield and said fitting with respect to said element.

4. Apparatus according to claim 3, in which a second wall 01': said shield comprises a recess and a projecting tongue adapted to be receiwidi-transversely within said trough-like element, therebyfllocating the assembly -of said shield and saianttragg iqeges eet10-said element.

i; to claim 3, inwhich said shield 5. Apparatus accordin hassecured. theretoitanduextemdiiiguoutwardlyr'from the back-. thereof a mbullmmemlicr -mdapted -to receive the barrel assembl'y-='of-*aid" s'tud d'riving 1001:" i

6. Appagatus aceqrding to clam-14.5, inxwhichzsaid tubular" 'rnembe r comprisesa portion within said shield which is of reducedtxterioi' and interior dimensions.

No references cited. 

